Novel transparent MgGa2O4 and Ni2+-doped MgGa2O4 ceramics
Date
2022-01
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
Abstract
In this study we fabricated, for the first time, magnesium gallate (MgGa2O4, a partially inverted spinel) transparent ceramics, both undoped and doped with 1 at% Ni. The specimens were derived from in-house prepared powder, with a crystallite size of ∼10 nm (by wet chemistry) and densified by pulsed electric current sintering (PECS; peak temperature 950 °C for 90 min). Densification levels of 99.84% and 99.52% of theoretical density were attained for doped and undoped materials, respectively. Doping with Ni was seen to marginally improve the densification level. Quite transparent specimens were produced: the best showing transmission of ∼89% of the theoretical level (thickness t = 0.85 mm). The absorption spectra revealed that the dopant was accumulated as Ni2+ in the octahedral sites of the lattice, as occurs in single-crystal specimens. After excitation at 980 nm, the doped disks exhibited a wide fluorescence band centered at 1264 nm.
Description
This article is published open access in the Journal of Advanced Ceramics, also available at https://doi.org/10.1007/s40145-021-0551-5. Made available under the CC BY-4.0 license.
Type
Journal Article
item.page.format
Keywords
Citation
Zhang, G., Goldstein, A. & Wu, Y. Novel transparent MgGa2O4 and Ni2+-doped MgGa2O4 ceramics. J Adv Ceram 11, 470–481 (2022). https://doi.org/10.1007/s40145-021-0551-5